I think you meant to say "I believeTHAT "that" is grammatically acceptable..." two "thats" there. (Try saying that if you are not a native English speaker). I still agree with Don, "who" is just as appropriate as "that" when saying "the family THAT / WHO married into the Smith family..." 1. Who hit the ball? 2. To whom was the ball hit? Would you say "That hit the ball?" No, That is not a personal pronoun and there is no subject to the sentence. Would you say "To that was the ball hit?" No, there is no direct object pronoun and again no subject to the sentence. Oh, I can't wait for Katherine Much to weigh in here, our Editor in Chief. Come on, Good Book Doctor! Craig On Feb 20, 2013, at 7:22 PM, DAVID BROWN wrote: > There will always be varying opinions of such matters, but I believe "that" is grammatically acceptable in this situation. It would be different if referring to a specific person in which case who or whom would be required. >